1. I'm using BV to put paypal 'add to cart' buttons on my site. I'm using a custom image, installed through the BV add to cart form. Is this automatically encrypted or am I supposed to do something else to encrypt the botton. I read something about button encryption and not sure if it's relavent here?
2. Also read on P/Pal website about instant payment notification and need for a notification URL? How neccessary is IPN? What is a notification URL? Paypal do not explain it in a way I can understand! Help please?